Port Moresby vs Papua New Guinea

Port Moresby and Papua New Guinea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Port Moresby	Yes	No	No	No
Papua New Guinea	Yes	No	No	No

Port Moresby (noun)	Papua New Guinea (noun)
the administrative capital and largest city of Papua New Guinea	a parliamentary democracy on the eastern half of the island of New Guinea; in 1975 it became an independent state within the Commonwealth of Nations